package com.hmall.common.interception;

import cn.hutool.core.util.StrUtil;
import com.hmall.common.utils.UserContext;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Author BUPT-Dingchang
 * @Create 2024/3/20 18:08
 * ClassName: UserInfoInterceptor
 * Description:
 */
public class UserInfoInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1. 获取请求头中的用户信息
        String userInfo = request.getHeader("user-info");
        // 2. 判断是否为空
        if(StrUtil.isNotBlank(userInfo)){
            // 不为空，保存到 threadLocal 中
            UserContext.setUser(Long.valueOf(userInfo));
        }
        // 3. 放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 1. 移除用户 threadLocal
        UserContext.removeUser();
    }
}
